Sectional core-mold.



A. MILLER.

SECTIONAL CORE MOLD.

APPLICATION FILED FEB. 23. 1915.

1,167,093., w Patented Ja1L4, 1916.

WE We antenna, ivrrnnnn, or, NEW YORK, N. Y.

, SECTIONAL oonn-ivronn.

Specification of Ltters'Patent. Pa'tented Jan. 4, 1916.

Application filedFebruary 23, 1915. Serial No.' 9,970.

.a core mold suitable foruse in the construction of concrete sewers, conduits, manholes, and other similar hollowstructures.

The object of my invention is to provide a sectional unit which is especially adapted for use when .a structure is made in one continuous length, such as a monolith, in which the series of units forming the. coremold may be left in place until the concrete mass has completely set,;after, which the units may be removed, one at a time, and set up again in line at another position to form -'a core mold for a new length of structure.

Another object is to provide sectional units which, when assembled, will form va core mold in which certain 'of the adjacent edges will coact to form broken and oppositely disposed spiral seams throughout the length of the core, thereby giving each unit a large bearing or supporting surface on its adjacent side units. 7 f

Another object is to provide a sectional unit having an internal peripheral flange which has a series of holes arrangedto-be brought into register with the corresponding holes in the peripheral wallsof the adjacent units, for the reception of tapered pins for locking the several units together.

A practical embodiment of my invention is represented in the accompanying drawings, in which- V Figure 1 represents a plan view of a num 'ber of units in juxtaposition to form a portion of'a core-mold, Fig. 2 represents a longitudinal central section through the same, Fig. 3 represents a transverse sectlo'n taken inthe plane of the line A-A of Fig. 1, looking in the direction of the arrows, Fig. 4 represents a transversesection taken in the-plane of the line BB of Fig. 1, looking in the direction of the arrows, Fig. 5 represents aninterior view of a sectional un1t,F1g.- 6 representsan adjacent unit.

. pins .11.

end elevation of the same partly broken away to show the parts more clearly, and

Fig. 7 represents a central section taken in the plane of the line OC of Fig. 5, looking in the direction of the arrows. I The sect onal units are denoted by ,1 and are provlded wlth peripheral flanges extending inwardly to form abutting walls for the ad acent un ts. 1 These units are preferably made of sheet metal and. of hexagonal form.

The flanges, in the present instance, are formed by L-shaped angle irons 2 secured to the unit by rivets ,3. ;The transverse flanges are denoted by 4L, 5, and the'pairs of oppositely arranged longitudinal side flanges by-G, 7 ,and 8, 9. The unit is curved trans-.

are parallel and, radially disposed so that each flange i will abut-the flange 5 of theadjacent unit. The side flanges 6 and 8 are radially arranged and are substantially parallel. The flanges 7 and 9are'also radially arranged' and are substantially parallel.

Thus it will beseen'thateach flange 6 will abut the flange 9 of the adjacent unit, and

each'flange'] willabutthe flange 8 of the Allthe side flanges will, therefore, be spirally radial with respect to the perlpherjal surface of the unit. These spirally radial flanges-being thus formed and abutted, admit ofa large bearing orsupport ngsurface and willresist a very great 7 pressure duetothe fact that the more weight that is applledto the outer surface of the units, the-tighter the flanges will be forced in both radial, and longitudinal directions.

In order 'to removably secure the several units in position to form the core mold, the vflanges16,:7, 8 -and. 9 are provided with'holes 10, whioh-wi1l register with the-corresponding holes in their adjacent flanges; which holes are, arranged to receive tapered I In assembling the units, it will be seen always project beyond their adjacent units,

that the two oppositely disposed units will It Will be seen that a plurality of longitudinal series of units are provided, the units of one series being in staggered relationship to the units of its adjacent series. In the present instance, four of such series have been shown.

By the use of this structure, all interior scaffolding may be eliminated for the reason that it is not necessary to support each unit after itis in place. The spiral flanges upon opposite sides after being pinned to the tWo adjacent units, Will support the balance or overhanging portion or the unit.

While I have shown the sectional units as being of hexagonal form, I Wish it understood that they may be made of many different shapes, such as diamond, rhomboid, etc., Without departing from the spirit and scope of my invention.

What I claim is 1. A core-mold for tubular structures comprising a plurality of longitudinal series of units, the units of one series being interlocked in staggered relationship to the units of another series, thereby forming a continuity of alternating transverse and longitudinal abutting Walls.

2. A core-mold for tubular structures comprising a plurality of longitudinal series of units, the units of one series being interlocked in staggered relationship to the units of another series, and means for removably securing the series of units together, thereby forming a continuity of alternating transverse and longitudinal abutting Walls.

8. A core-mold for cylindrical structures comprising a plurality of longitudinal series of transversely curved units, the units of one series being interlocked in staggered relationship to the units of another ser e thereby forming a continuity of alternati transverse and longitudinal abutting Walls.

4. A core-mold for cylindrical structures comprising a plurality of longitudinal series of transversely curved units, the, units of one series being interlocked in staggered relationship to the units of another series, and means for removably securing the series of units together, thereby forming a continuity of alternating transverse and longitudinal abutting Walls.

5. A core-mold for cylindrical structures comprising a plurality of longitudinal series of transversely curved units, the units of one series being interlocked in staggered relationship to the units of another series,

each unit having radially arranged and substantially parallel side flanges, thereby forming a continuity of alternating transverse and longitudinal abutting Walls.

6. A core-mold for cylindrical structures comprising a plurality of longitudinal series of transversely curved units, the units of one series being interlocked in staggered relationship to the units of another series, each unit having radially arranged and substantially parallel side flanges, thereby forming a continuity of alternating transverse and longitudinal abutting Walls, and means for removably securing the series of units together.

7. A core-mold for cylindrical structures comprising a plurality of longitudinal series of transversely curved units, the units of one series being interlocked in staggered relationship to the units of another series, each unit being provided with interiorly extended peripheral flanges, said flanges being radially arranged With respect to the curved periphery of the unit and substantially parallel With the diametrically opposite flanges, thereby forming a continuity of alternating transverse and longitudinal abutting Walls, and means for removably securing the series of units together.

8. A core-mold for cylindrical structures comprising a plurality of longitudinal series of transversely curved units, the units or one series being interlocked in staggered relationship to the units of another series, each unit being provided With interiorly ex tended peripheral flanges, said flanges being radially arranged With respect to the curved periphery of the unit and substantially parallel With the diametrically opposite flanges, thereby forming a continuity of alternating transverse and longitudinal abutting Walls, said flanges having holes therethrough and pins adapted to engage the flanges for securing the series of units together. 7 i

9. A core-mold for cylindrical structures comprising a plurality of longitudinal series,

of transversely curved units, the units of one series being interlocked in staggered relationship to the units of another series, each unit being provided With interiorly extended peripheral flanges, said flanges being spirally and radially arranged With respect to the curved periphery of the unit and substantially parallel with the diametrically opposite side flanges and transversely parallel end flanges, thereby forming a continuity of alternating transverse and longitudinal abutting Walls, and means for removably securing the series of units together.

10. A core-mold for cylindrical structures comprising a plurality of longitudinal series of transversely curved units, the units of one series being interlocked in staggered relationship'to the units of another series, each unit being provided With interiorly extended peripheral flanges, said flanges being spirally and radially arranged With respect to the curved periphery of the unit and substantially parallel With the diametrically opposite side flanges and transversely parallel end flanges, thereby forming a con tinuity of alternating transverse and ionpresence of 'tWe Witnesses, this eighteenth gitudinal abutting Walls, said side flanges having holes therethrough, and pins adapted to engage adjacent flanges for securing the series of units together. Witnesses:

In testimony that I claim the foregoing F. GEORGE BARRY, as my invention, I have signed my name in C. S. SUNDGREN.

day of February, 1915.

' ARTHUR MILLER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

